Unity實現攻擊範圍檢測並繪製檢測區域
阿新 • • 發佈:2020-04-29
本文例項為大家分享了Unity實現攻擊範圍檢測並繪製檢測區域的具體程式碼,供大家參考,具體內容如下
一、圓形檢測
using System.Collections; using System.Collections.Generic; using UnityEngine; /// <summary> /// 圓形檢測,並繪製出執行的攻擊範圍 /// </summary> public class CircleDetect : MonoBehaviour { GameObject go; //生成矩形的物件 public Transform attack; //被攻擊方 MeshFilter mf; MeshRenderer mr; Shader shader; void Start () { } void Update () { if (Input.GetKeyDown(KeyCode.A)) { ToDrawCircleSolid(transform,transform.localPosition,3); if (CircleAttack(attack,transform,3)) { Debug.Log("攻擊到了"); } } if (Input.GetKeyUp(KeyCode.A)) { if (go != null) { Destroy(go); } } } /// <summary> /// 圓形檢測 /// </summary> /// <param name="attacked">被攻擊者</param> /// <param name="skillPostion">技能的位置</param> /// <param name="radius">半徑</param> /// <returns></returns> public bool CircleAttack(Transform attacked,Transform skillPostion,float radius) { float distance = Vector3.Distance(attacked.position,skillPostion.position); if (distance <= radius) { return true; } else { return false; } } //生成網格 public GameObject CreateMesh(List<Vector3> vertices) { int[] triangles; Mesh mesh = new Mesh(); int triangleAmount = vertices.Count - 2; triangles = new int[3 * triangleAmount]; //根據三角形的個數,來計算繪製三角形的頂點順序 //順序必須為順時針或者逆時針 for (int i = 0; i < triangleAmount; i++) { triangles[3 * i] = 0; triangles[3 * i + 1] = i + 1; triangles[3 * i + 2] = i + 2; } if (go == null) { go = new GameObject("circle"); go.transform.SetParent(transform,false); go.transform.position = new Vector3(0,-0.4f,0); mf = go.AddComponent<MeshFilter>(); mr = go.AddComponent<MeshRenderer>(); shader = Shader.Find("Unlit/Color"); } //分配一個新的頂點位置陣列 mesh.vertices = vertices.ToArray(); //包含網格中所有三角形的陣列 mesh.triangles = triangles; mf.mesh = mesh; mr.material.shader = shader; mr.material.color = Color.red; return go; } /// <summary> /// 繪製實心圓形 /// </summary> /// <param name="t">圓形參考物</param> /// <param name="center">圓心</param> /// <param name="radius">半徑</param> public void ToDrawCircleSolid(Transform t,Vector3 center,float radius) { int pointAmount = 100; float eachAngle = 360f / pointAmount; Vector3 forward = t.forward; List<Vector3> vertices = new List<Vector3>(); for (int i = 0; i < pointAmount; i++) { Vector3 pos = Quaternion.Euler(0f,eachAngle * i,0f) * forward * radius + center; vertices.Add(pos); } CreateMesh(vertices); } }
效果圖:
二、矩形檢測
using System.Collections; using System.Collections.Generic; using UnityEngine; /// <summary> /// 矩形型攻擊檢測,並繪製檢測區域 /// </summary> public class DrawRectangDetect : MonoBehaviour { public Transform attacked; GameObject go; //生成矩形 MeshFilter mf; MeshRenderer mr; Shader shader; void Start () { } void Update () { if (Input.GetKeyDown(KeyCode.A)) { ToDrawRectangleSolid(transform,4,2); if (RectAttackJubge(transform,attacked,2f)) { Debug.Log("攻擊到"); } } if (Input.GetKeyUp(KeyCode.A)) { if (go != null) { Destroy(go); } } } /// <summary> /// 矩形攻擊範圍 /// </summary> /// <param name="attacker">攻擊方</param> /// <param name="attacked">被攻擊方</param> /// <param name="forwardDistance">矩形前方的距離</param> /// <param name="rightDistance">矩形寬度/2</param> /// <returns></returns> public bool RectAttackJubge(Transform attacker,Transform attacked,float forwardDistance,float rightDistance) { Vector3 deltaA = attacked.position - attacker.position; float forwardDotA = Vector3.Dot(attacker.forward,deltaA); if (forwardDotA > 0 && forwardDotA <= forwardDistance) { if (Mathf.Abs(Vector3.Dot(attacker.right,deltaA)) < rightDistance) { return true; } } return false; } //製作網格 private GameObject CreateMesh(List<Vector3> vertices) { int[] triangles; Mesh mesh = new Mesh(); int triangleAmount = vertices.Count - 2; triangles = new int[3 * triangleAmount]; for (int i = 0; i < triangleAmount; i++) { triangles[3 * 1] = 0; triangles[3 * i + 1] = i + 1; triangles[3 * i + 2] = i + 2; } if (go == null) { go = new GameObject("Rectang"); go.transform.position = new Vector3(0,0.1f,0); mf = go.AddComponent<MeshFilter>(); mr = go.AddComponent<MeshRenderer>(); shader = Shader.Find("Unlit/Color"); } mesh.vertices = vertices.ToArray(); mesh.triangles = triangles; mf.mesh = mesh; mr.material.shader = shader; mr.material.color = Color.red; return go; } /// <summary> /// 繪製實心長方形 /// </summary> /// <param name="t">矩形參考物</param> /// <param name="bottomMiddle">矩形的中心點</param> /// <param name="length">矩形長度</param> /// <param name="width">矩形寬度的一半</param> public void ToDrawRectangleSolid(Transform t,Vector3 bottomMiddle,float length,float width) { List<Vector3> vertices = new List<Vector3>(); vertices.Add(bottomMiddle - t.right * width); vertices.Add(bottomMiddle - t.right * width + t.forward * length); vertices.Add(bottomMiddle + t.right * width + t.forward * length); vertices.Add(bottomMiddle + t.right * width ); CreateMesh(vertices); } }
效果圖:
三、扇形攻擊檢測
using System.Collections; using System.Collections.Generic; using UnityEngine; /// <summary> /// 扇型攻擊檢測,並繪製檢測區域 /// </summary> public class SectorDetect : MonoBehaviour { public Transform attacked; //受攻擊著 GameObject go; MeshFilter mf; MeshRenderer mr; Shader shader; void Start () { } void Update () { if (Input.GetKeyDown(KeyCode.A)) { ToDrawSectorSolid(transform,60,3); if (UmbrellaAttact(transform,attacked.transform,4)) { Debug.Log("受攻擊了"); } } if (Input.GetKeyUp(KeyCode.A)) { if (go != null) { Destroy(go); } } } /// <summary> /// 扇形攻擊範圍 /// </summary> /// <param name="attacker">攻擊者</param> /// <param name="attacked">被攻擊方</param> /// <param name="angle">扇形角度</param> /// <param name="radius">扇形半徑</param> /// <returns></returns> public bool UmbrellaAttact(Transform attacker,float angle,float radius) { Vector3 deltaA = attacked.position - attacker.position; //Mathf.Rad2Deg : 弧度值到度轉換常度 //Mathf.Acos(f) : 返回引數f的反餘弦值 float tmpAngle = Mathf.Acos(Vector3.Dot(deltaA.normalized,attacker.forward)) * Mathf.Rad2Deg; if (tmpAngle < angle * 0.5f && deltaA.magnitude < radius) { return true; } return false; } public void ToDrawSectorSolid(Transform t,float radius) { int pointAmmount = 100; float eachAngle = angle / pointAmmount; Vector3 forward = t.forward; List<Vector3> vertices = new List<Vector3>(); vertices.Add(center); for (int i = 0; i < pointAmmount; i++) { Vector3 pos = Quaternion.Euler(0f,-angle / 2 + eachAngle * (i - 1),0f) * forward * radius + center; vertices.Add(pos); } CreateMesh(vertices); } private GameObject CreateMesh(List<Vector3> vertices) { int[] triangles; Mesh mesh = new Mesh(); int triangleAmount = vertices.Count - 2; triangles = new int[3 * triangleAmount]; //根據三角形的個數,來計算繪製三角形的頂點順序 for (int i = 0; i < triangleAmount; i++) { triangles[3 * i] = 0; triangles[3 * i + 1] = i + 1; triangles[3 * i + 2] = i + 2; } if (go == null) { go = new GameObject("mesh"); go.transform.position = new Vector3(0f,0.5f); mf = go.AddComponent<MeshFilter>(); mr = go.AddComponent<MeshRenderer>(); shader = Shader.Find("Unlit/Color"); } mesh.vertices = vertices.ToArray(); mesh.triangles = triangles; mf.mesh = mesh; mr.material.shader = shader; mr.material.color = Color.red; return go; } }
效果圖:
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